Budgerigars are both seen as a benefit and a possible threat to humans.
Negative: a budgerigar flock can consume a large number of seeds at the same time and that concerns farmers.
Positive: budgerigars are the most known pet bird in the world. There are about 5,000,000 budgerigars in the world, allowing scientists to study them well. In fact, more is known of the budgerigars' biology than of any other parrot.